In reply to Robert Durran:
> (In reply to Exile)
> [...]
>
> Why should a 2 hour walk with a heavy pack up a hill (maybe one and a half hours up, half an hour down)not be as beneficial (and more directly so) than a 2 hour cycle?
Again - in my experience - because there is conciderably less impact cycling where as coming down a hill it took you 90 minutes to get up in 30 minutes, with a heavy pack, ain't good for the joints.
Add to this that you can do it from the house, in the dark, before you go to work, indeed, on the way to work, back from work etc, it is more time effective for almost all people.
> Also, in my experience it will be much better than a 2 hour hill run - while good for general aerobic fitness, there is a limit to how much leg strength for load carrying is gained from running.
Completely agree, which is why I prefer cycling - it builds the strength running doesn't. However, if the op isn't near hills and doesn't have a bike running is still very good for you, and like any hard endurance activity will build mental resiliance which is pretty useful for alpinism.
> Incidentally, my hill running is always best after a mountaineering trip when I might have done no running for a couple of months.
No suprise really. You've been walking up hills with a pack for the best part of a couple of months, perhaps at altitude, and then when you come home and go for a hill run with no / very little weight you feel great.